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Want to make sure you get the sleep that you need? Use our sleep calculator to plan your nightly schedule so that you can wake up refreshed in the morning.
There are five sleep stages in a cycle — wake, NI, N2, N3, and REM — which typically lasts 90-110 minutes. Research suggests that getting four to six cycles is ideal, and being sure to complete full cycles will provide you with the best sleep experience.
Learn what time to go to bed and how much sleep you need for good health with our sleep calculator.
An average sleep cycle lasts about 90 minutes. Ideally, you need four to six cycles of sleep every 24 hours to feel fresh and rested. Each cycle contains four individual stages: three that form ...
Our personalized sleep calculator will help you find out your best time to wake up or go to bed based on your unique sleep cycle.
How many hours of sleep do adults need? How about children? See sleep hours by age with this sleep and age chart to find your recommended amount of sleep.
Prioritize getting enough sleep each night to stay happy, healthy, and sharp. Healthy adults need at least seven hours of sleep per night. Babies, young children, and teens need even more sleep to enable their growth and development. Knowing the general recommendations for how much sleep you need is a first step.